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Measurements of Unburnt Hydrocarbons in a Spark Ignition Combustion Engine during the Warm-Up Period
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English
Abstract
New European motor vehicles must comply with emissions regulations which will soon include the exhaust produced during cranking and warm-up, when a catalyst is not active. This paper describes a technique of using rapid acting sampling valves to take measurements from the combustion chamber and exhaust pipe of a spark ignition engine during this period. The samples were analysed for both total hydrocarbons and individual species. Results obtained from an engine operating on propane fuel are presented.
The concept of a storage parameter, developed previously from tests on an engine operating at the cyclic repeating condition (CRC) is used to help interpret the measurements. The total hydrocarbons readings show the behaviour of the engine to resemble that of the fully warmed state 15 seconds after start.
Using the storage parameter indicates this similarity occurs closer to 50 seconds from start.
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Citation
Brown, P. and Woods, W., "Measurements of Unburnt Hydrocarbons in a Spark Ignition Combustion Engine during the Warm-Up Period," SAE Technical Paper 922233, 1992, https://doi.org/10.4271/922233.Also In
References
- Lo Russo, J. A. Lavoir, G. A. Kaiser, E. Q. “An electrohydraulic gas sampling valve with application to hydrocarbon emissions studies” SAE Paper 800045 Trans. 89 1980
- Panesar, A. Brown, P. G. Woods, W. A. “The results of recent experiments on unburnt hydrocarbons” Proc. I.Mech.E. Int. Conf. on Combustion in Engines 085298653x 1988 261 271
- Hymas, G. J. “In-cylinder release of unburned hydrocarbons in a spark ignition engine” Univ. of London 1991
- Hymas, G. J. Grigulis, V. J. Brown, P. G. Woods, W. A. “Post-flame release of hydrocarbons in a spark ignition engine” I.Mech.E. for inclusion in Conf. Combustion in Engines Dec. 1992
- Panesar, A. Woods, W. A. Brown, P. G. “Instrumentation for determining the time history of hydrocarbons in spark ignition engines” Proc. I.Mech.E. Seminar London Dec. 1991 19 27
- Lewis, B. von Elbe, G. “Combustion, flames and explosions of gases” Academic Press Inc. London 1961 1 730
- Brown, P. G. Panesar, A. Woods, W. A. “Time resolved hydrocarbon samples taken from the exhaust system of a standard production OHC spark ignition engine” J. Mech. and Auto. Eng. Soc. Tunka Abdul Rahman Coll. Kuala Lumpur 0127-6859 10 1986 87 96
- Kaplan, J. A. Heywood, J. B. “Modeling the spark ignition engine warm-up process to predict component temperatures and hydrocarbon emissions” SAE Paper No. 910302 1991 1 15